When an implant tooth starts to move, the post in the bone is usually not the part that has failed. Implants themselves hold up well: a 2012 systematic review in Clinical Oral Implants Research (Jung and colleagues) found about 97 percent of implants supporting single crowns were still in place after five years. The same review found screw loosening was the most common mechanical problem, affecting close to 9 percent of crowns over that time. So a wobble is more often a loose screw or crown than a lost implant, but it still needs to be checked soon.
Three parts, three very different problems
An implant tooth is built in layers. The fixture is the titanium post that sits in the jawbone where the root used to be. The abutment is the connector that screws into the fixture. The crown is the visible tooth fixed on top, either cemented onto the abutment or held by a small screw.
Movement in any one of these can feel the same from inside your mouth, but the meaning is quite different:
- A loose crown or abutment screw is a mechanical problem and is usually repairable without touching the implant.
- A loose fixture means the bond between the implant and the bone has been lost, which is far more serious.
Telling these apart takes an examination and usually an X-ray. It cannot be judged reliably at home.
Why screws and crowns work loose
Biting puts repeated force through the crown and down into the abutment screw. Over months and years, that cycle can gradually back the screw off, especially with heavy chewing, grinding or clenching, or a bite that loads one implant more than its neighbours. Cement holding a crown can also weaken, letting the crown rock while the implant underneath stays firm.
These are the problems most often found when someone reports a wobbly implant tooth. At the appointment, the dentist removes the crown if needed, checks each part for wear or damage, and retightens the screw to the manufacturer's specified torque or replaces it. A crown can be re-secured or remade. Our guide to a loose implant crown goes through that visit in more detail.
When the implant itself moves
The more serious cause is loss of the bone that holds the fixture. The usual culprit is peri-implantitis, a plaque-related inflammatory condition around an implant that behaves much like gum disease around a natural tooth. It can progress quietly. Bleeding when you brush around the implant, swelling, pus, a bad taste or a gum line that seems to be shrinking back are all reasons to be seen.
In the early stages, cleaning and infection control can sometimes stop the bone loss, and our guide to peri-implantitis treatment explains the options. Once enough bone has gone that the fixture itself is mobile, the implant usually cannot be kept, and it is removed so the area can heal before a replacement is planned.
| What is moving | Common reason | What is usually done | Outlook |
|---|---|---|---|
| Crown | Cement or holding screw has loosened | Re-secure or remake the crown | Usually good; implant unaffected |
| Abutment screw | Repeated bite forces, grinding | Retighten to specified torque or replace the screw | Good when found early |
| Fixture, early bone loss | Peri-implantitis | Cleaning and infection control | May be stabilised |
| Fixture, advanced bone loss | Peri-implantitis or loss of bone contact | Removal, healing, then a replacement plan | Implant usually cannot be saved |
Leaving a loose screw can make things worse
A crown that rocks on a loose screw puts uneven force on the parts. Over time that can wear or break the screw, damage the connection inside the implant, and let bacteria collect in the gap. What would have been a straightforward retightening can then become a more involved repair. That is why a prompt visit matters even when nothing hurts.
Until you are seen, chew on the other side, keep cleaning gently around the implant, and do not try to tighten, twist or wiggle it. Home attempts can strip the screw or push bacteria further under the gum.
Keeping implants firm
Implants need the same daily care as natural teeth, with careful cleaning around the gum line, and they benefit from regular reviews where the gums, bite and bone levels can be checked. If you grind or clench, a custom night guard can reduce the load on the implant parts. Treating gum inflammation early protects implants as well as teeth, which our guide to gum disease treatment discusses.
If an implant does need replacing, our guides to dental implants and implants compared with bridges and dentures set out the choices.
Common questions
Does a loose implant tooth mean the implant has failed?
Usually not. More often the crown or the screw underneath has loosened while the implant stays fixed in the bone. Only movement of the fixture itself means the implant has lost its hold.
Should it hurt?
Not necessarily. A loose crown or screw is often painless. Pain, swelling, bleeding or a bad taste around the implant suggest inflammation or infection and should be seen promptly.
Is it an emergency?
It is not usually an after-hours emergency unless there is swelling or significant pain, but it should be booked in soon rather than left. Earlier assessment usually means a simpler repair.
Getting it checked
A wobbly implant tooth is most often a loose crown or screw, which can usually be repaired, but now and then it is a sign of bone loss around the implant, which is more serious. Either way, leave it alone and have it looked at soon. Implants are placed and maintained at Lumi Dental, and we can assess a loose implant and explain what needs to be done. See our current deals page or read about implants at our Melrose Park practice.
Sources
- Jung RE, Zembic A, Pjetursson BE, et al. Systematic review of the survival rate and the incidence of biological, technical, and aesthetic complications of single crowns on implants reported in longitudinal studies with a mean follow-up of 5 years. Clinical Oral Implants Research. 2012;23 Suppl 6:2 to 21. PubMed 23062124
This article is general information and not a substitute for personal dental advice.
